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FILE - In this Jan. 16, 2013 file photo, President Barack Obama, accompanied by Vice President Joe Biden, talks about proposals to reduce gun violence at the White House in Washington. Obama has called for a ban on military-style assault weapons and high-capacity ammunition magazines and is pushing other policies in the wake of the mass shooting in December 2012 at an elementary school in Newtown, Conn. In response, gun-rights advocates have accused Obama and others of ignoring the Second Amendment rights of Americans. (AP Photo/Charles Dharapak, File)

FILE - In this Jan. 16, 2013 file photo, President Barack Obama, accompanied by Vice President Joe Biden, talks about proposals to reduce gun violence at the White House in Washington. Obama has called for a ban on military-style assault weapons and high-capacity ammunition magazines and is pushing other policies in the wake of the mass shooting in December 2012 at an elementary school in Newtown, Conn. In response, gun-rights advocates have accused Obama and others of ignoring the Second Amendment rights of Americans. (AP Photo/Charles Dharapak, File)